Printing-machine



(No Model.)

J. H. HOLMES.

PRINTING MACHINE.

No. 247,059. Patented Sept. 13,1881.

Fig.1.

- J I l F a? a 1J2. {lax N l 7 Invantav. Attest: g- J a N, PETERS. Mammoram; Washingiun, u. (L

NITED "STATES;

PATENT OFFICE.

JESSE H. HOLMES, OF ST. LOUIS. MISSOURI.

PRIVNTINGJMIACHINE.

SPECIFICATION forming part of Letters Patent No. 247,059, datedSeptember 13, 1881.

' Application filed July 11, 1881. (No model.)

To all'whom it may concern Be it known that I, JEssE H. HoLMEs, of St.Louis, Missouri, have made a new and use-,'

- ful Improvementtin Printing-Machines, of

which the following is a full, clear, and exact description,referencebeing had to the annexed drawings, making part of this specification, inwhich- Figure 1 is a side elevation of a printingpress having theimprovement; Fig. 2, a lontudinal vertical section, and Fig. 3 atransverse vertical section, of the improved press.

The same letters denote the same parts.

The present invention is an improvementin that class of cylinderprinting-machines wherein an impression in different colorsis obtained.

The special aim of the invention is to provide an improved means forobtaining an impression in two colors by means of a flat rather than acircular form, printing directly from the types. -It consists, mainly,in providing the cylinder with two impression-surfaces, which are spacedapart upon the cylinder a distance not less than the length of one ofthe surfaces, and employing, in combination therewith, a double ortwo-part bed, the bed having a reciprocating movement past the revolvingcylinder, the parts of the bed and the forms being spaced apart adistance not less than the length of one of the impression-surfaces, theforms upon the two parts respectively of the bed being inked indifferent colors and the surfaces of the cylinder being-presentedsuccessively to each part of the bed.

Referring to the drawings, A represents a printing-press, which,'savingas modified by the present improvement, is substantially of the usualconstruction.

B represents the impression-cylinder. It is furnished with twoimpression-surfaces, O and D, arranged upon opposite sides of thecylinder, and each occupying not over one-fourth of the lateral surfaceof the cylinder. Each of the depressions E and 13 therefore extends overat least onefourth of the lateral surface of the cylinder. The latterrotates in the bearin gs b, in the direction indicated by the arrows,Figs. 1 and 2.

G H represent a two-part bed, that holds the form to be printed, theforms being inked in different colors by their respective fountains,andbeing suitably relatively arranged to produce the desired impression.The cylinder rotates constantlyin one direction. The bed GrH hasareciprocating movement beneath the cylinder, moving at the same rate asthe cylinder.

The inking-fountains g and hare placed one on each side of the cylinderB, ata distance from the point B not less than the length of one of theparts G H, so that each fountain-roller pression-say iii bluefrom theform on the 'part H. After this last-named impression has been taken thebed moves back, as indicated by the arrows in Fig. 2, from left toright, to its original position, the part H in this backward movementbeing presented to the depression E, the space between the parts-G and H(or the forms respectively upon the parts G and H) to theimpression-surface O, and the part G to the depression F. As the bedstarts again to the left the impression-surface D will be presented tothe form on the part G, and in so doing the sheet will take its secondimpression in red, and is then ready to be discharged from the cylinderat b, having passed over both forms and the printing having beencompleted. Meanwhileanew sheethas been taken on the-surface O and theoperation is repeated that is, at every one and one-half revolution ofthe cylinder B a sheet is printed in two colors.

By means of suitabie appliances (not shown, as their construction isfamiliar) the customary gripers will be worked to close at the point Keach time the bed part G commences to pass under the cylinder toward theleft, and the gripers will open atthe point b to discharge M upon theshaft 122, and turning with the gear points K and b to receive anddischarge the sheets.

In operating the above-described mechanism it is necessary to providefor keeping the inipression-surfaces of the cylinder from contact withthe forms on the parts Gr H during the movement of the bed from left toright, and also in the forward movement of the bed, saving' as abovedescribed. This is effected by spacing the surfaces Gr H apart adistance not less than the length of one of the surfaces 0 D, and so asto leave a depression between them, and fastening them rigidly to abase, g, which is moved reciprocating] y beneath the cylinder, (or, whatis equivalent thereto, by spacing the forms apart a distance-not lessthan the length of one of the surfaces (JD upon a plane single bed,) thebed being furnished with the rack L, and being moved to and fro, asdescribed, by means of mechanism similar to that in use inprinting-presses for moving the bed, the gear N, driving the pinion 0,which is attached to the shaft 0, upon the inner end of which shaft isthe pinion P, which engages with and moves the rack .L and bed G H..

I hereby disclaim the subject-matter of my pending application forLetters Patent for an I improvement in printing-presses, the serialnumber of which is 18,874.

I claim- 1. In a printing-in achine, an impression-cylinder havingtwoimpression-surfaces arranged directly opposite each other upon thecylinder, and spaced apart thereon a distance not less than the lengthof one of the surfaces, in combination with a double or two-partflatbed, the two parts of the bed being spaced apart a distance not lessthan the length of one of the cylinder impression-surfaces, and the bedhaving a reciprocating movement past the cylinder, for the purposedescribed.

2. In a printing-machine, the impression-cyl inder B, having the twoimpression-surfaces O and D and the depressions E and F, arranged,extended, and spaced apart, as described, in combination with the.two-part bed G H, havingthe parts G and H made fiat and rigidly attachedto a single flat base, 9, and spaced apart thereon, as described, andoperating as and for the purpose set forth.

JESSE H. HOLMES.

WVitnesses CHAS. D. MOODY, CHARLES PIGKLES.

